Synthesis of anatase TiO2 microspheres and their efficient performance in dye-sensitized solar cell

Gowthambabu, V.; Deshpande, Mrunal; Govindaraj, R.; Krishna, Vijay; Charumathi, M. Leela; Kumar, Jayant; Vignesh, M; Daniel, R. Isaac; Ramasamy, P.

doi:10.1007/s10854-021-06923-1

Cited by 5 publications

(2 citation statements)

References 47 publications

(43 reference statements)

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“…Moreover, the extinction coefficient of the dyes used in cobalt DSSCs are typically higher compared with Ru-dyes in iodine cells. These major differences make it imperative to tune the thickness, porosity, and light-scattering ability of the photoanode for each type of DSSCs. − …”

Section: Resultsmentioning

confidence: 99%

Conventional and Back-Illuminated Cobalt- and Iodine-Mediated Dye-Sensitized Solar Cells for Artificial and Solar Light Conversion

Hora

Santos

Sales

et al. 2022

ACS Appl. Energy Mater.

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Dye-sensitized solar cells (DSSCs) are among the leading PV technologies for indoor applications. These devices need to be optimized for these illumination conditions since, as it will be demonstrated, the best devices under solar conditions do not originate from the best devices under artificial illumination. This work studies the impact of the photoanode thickness, its light-scattering properties, dye loading, distance from the photoelectrode to the counter electrode on the charge transfer, recombination, and photovoltaic response of cobalt (III/II) bipyridine ([Co(bpy) 3 ] 3+/2+ ) and iodide/triiodide (I − /I 3 − ) DSSCs under 1 Sun and artificial 1000 lx light illumination. The champion [Co(bpy) 3 ] 3+/2+ device displayed a power conversion efficiency (PCE) of 11.0 and 32.0% under AM1.5G and 1000 lx, respectively. The best I − /I 3 − cells yielded 9.0% 1 Sun PCE and 23.1% of PCE under 1000 lx. Optimized [Co(bpy) 3 ] 3+/2+ and I − /I 3 − DSSCs demonstrated huge potential as efficient indoor-photovoltaics and can straightforwardly be used as back-illuminated devices to improve the output power under low illumination. Under 1000 lx room light, the champion cobalt DSSCs displayed a record PCE of 27.3% from the rear-side with 85.3% of retention ratio.

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Section: Resultsmentioning

confidence: 99%

Conventional and Back-Illuminated Cobalt- and Iodine-Mediated Dye-Sensitized Solar Cells for Artificial and Solar Light Conversion

Hora

Santos

Sales

et al. 2022

ACS Appl. Energy Mater.

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“…From the optical density spectra of the photoanodes loaded with the N719 dye (Figure 3), it can be noted that the absorption of the dye was improved with an increase in ball size, especially for the paste obtained with the 10 and 12 mm balls. This is due to the fact that decreasing the size of the crystallites confirmed by the XRD analysis allowed the absorption of a much larger amount of dye on the surface of the photoanode, and implicitly led to an increase in the efficiency of DSSC under indoor light conditions [44]. The photovoltaic characteristics of the DSSC, obtained from the TiO2 paste using the high-energy planetary ball mill with different ball sizes (5, 8.5, 10, and 12 mm) and rotation times (3 and 12 h) under 1000 lux illumination, are shown in Figure 4.…”

Section: Sample Peak (1 0 1) Intensity Crystallite Size 3 H [%] 12 H ...mentioning

confidence: 99%

Enhanced Indoor Conversion Efficiency of Dye-Sensitized Solar Cells by Optimizing Ball-Milling Process of TiO2 Paste

Ursu,

Casut,

Albulescu

et al. 2024

Coatings

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The rapid spread of the Internet of Things (IoT) along with the development of innovative low-power electronic devices has also driven the development of indoor photovoltaics. In this paper, we propose a simple and economically feasible solution that can improve the efficiency of dye-sensitized solar cells (DSSCs) under indoor light conditions by ~112%, without requiring a complex TiO2 photoanode architecture or the design of new dyes. The ball milling process of the TiO2 paste was optimized for indoor light conditions for the first time, both in terms of efficiency and production costs, by developing a rapid preparation method that can be used industrially for the application of DSSCs. A simple use of 12 mm diameter balls caused beneficial structural modifications, decreasing the size of the crystallites, and leading to a high OH generation on the TiO2 surface responsible for the improvement of energy conversion efficiency.

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Calcium-doped TiO2 microspheres and near-infrared carbazole-based sensitizer for efficient co-sensitized dye-sensitized solar cell

et al. 2023

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Here, we synthesized metal-free organic dye (CCPICPB) with two carbazole donor groups and two anchoring groups that exhibit a panchromatic absorption in the near-infrared range of up to 750 nm. To study the photophysical properties of synthesized CCPICPB dye, the UV–Vis and cyclic voltammetric experiments were studied and the obtained results were validated with theoretical simulation studies. After that, the solvothermal approach is used to synthesize pristine anatase and calcium (Ca)-doped TiO2 microspheres with a smooth morphology. These microstructures are examined in depth using XRD, electron microscopy and electrochemical analysis methods. On TiO2 and Ca-doped TiO2 photoanode materials, we first evaluated the performance of CCPICPB dye. Upon our optimized experimental condition, the 3% Ca-TiO2 photoanode-based device exhibits an efficiency of 4.04%, which is greater than that of the pristine TiO2 photoanode-based device (2.93%). Because of the quicker electron transport in the Ca-TiO2 film, the short-circuit current density and efficiency of DSSCs were improved. Moreover, when the CCPICPB dye was used as a co-sensitizer with the common Ru(II) dye (Z907), interestingly it showed the highest efficiency (6.11%) when compared with Z907 alone (5.12%). This improved efficiency of the co-sensitized device resulted from greater VOC conjugated with improved JSC. The JSC was improved because CCPICB dye could compensate for the photocurrent loss caused by redox electrolyte while the VOC was improved because electron recombination was inhibited under the co-sensitization conditions. Graphical abstract

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Synthesis of anatase TiO2 microspheres and their efficient performance in dye-sensitized solar cell

Cited by 5 publications

References 47 publications

Conventional and Back-Illuminated Cobalt- and Iodine-Mediated Dye-Sensitized Solar Cells for Artificial and Solar Light Conversion

Conventional and Back-Illuminated Cobalt- and Iodine-Mediated Dye-Sensitized Solar Cells for Artificial and Solar Light Conversion

Enhanced Indoor Conversion Efficiency of Dye-Sensitized Solar Cells by Optimizing Ball-Milling Process of TiO2 Paste

Calcium-doped TiO2 microspheres and near-infrared carbazole-based sensitizer for efficient co-sensitized dye-sensitized solar cell

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